Which Layer 1 device broadcasts data from a single point to all devices on the network without filtering?

Which Layer 1 device broadcasts data from a single point to all devices on the network without filtering?

• A. Hub
• B. Repeater
• C. Bridge
• D. Router

Answer: (A)

At this level of networking, you’re looking at how devices at the physical layer handle signals. A hub acts as a multipoint repeater: when a device sends a frame, the hub copies that signal and sends it out to every other connected port. It doesn’t inspect MAC addresses or decide where the frame should go, so every device on that network segment receives the transmission. That’s why it broadcasts from a single point to all devices without filtering. Because nothing is filtered, all participants share one collision domain, which is another hallmark of hub behavior. Bridges, routers, and even a basic repeater differ in how they handle traffic. A bridge operates at a higher layer to filter frames based on MAC addresses and forward only to the appropriate segment. A router makes forwarding decisions based on IP addresses between networks. A repeater regenerates the signal but, like the hub, doesn’t filter, yet the classic description of “broadcasting to all devices on the network” is most closely associated with a hub.

At this level of networking, you’re looking at how devices at the physical layer handle signals. A hub acts as a multipoint repeater: when a device sends a frame, the hub copies that signal and sends it out to every other connected port. It doesn’t inspect MAC addresses or decide where the frame should go, so every device on that network segment receives the transmission. That’s why it broadcasts from a single point to all devices without filtering. Because nothing is filtered, all participants share one collision domain, which is another hallmark of hub behavior.

Bridges, routers, and even a basic repeater differ in how they handle traffic. A bridge operates at a higher layer to filter frames based on MAC addresses and forward only to the appropriate segment. A router makes forwarding decisions based on IP addresses between networks. A repeater regenerates the signal but, like the hub, doesn’t filter, yet the classic description of “broadcasting to all devices on the network” is most closely associated with a hub.